Dr. Egan J Chernoff (@MatthewMaddux) is an Associate Professor of Mathematics Education in the Department of Curriculum Studies (and Associate Member [2014-2019], Department of Educational Administration) in the College of Education at the University of Saskatchewan. Currently, Egan is the English/Mathematics editor of the Canadian Journal of Science, Mathematics and Technology Education, an associate editor of the Statistics Education Research Journal, and is the Book Reviews Editor of The Mathematics Enthusiast. He also sits on the Board of Directors for the learning of mathematics, and is an editorial board member of Vector: Journal of the British Columbia Association of Mathematics Teachers and The Variable: An SMTS Periodical. (From 2009 to 2015, he was the editor of vinculum: Journal of the Saskatchewan Mathematics Teachers’ Society.) His research utilizes logical fallacies (e.g., the fallacy of composition, the appeal to ignorance and others) and particular theories, models and frameworks from the fields of mathematics education and cognitive psychology (e.g., attribute substitution) to account for prospective elementary, middle and high school math teachers' normatively incorrect, inconsistent and sometimes inexplicable responses to a variety of probabilistic tasks. Egan also makes efforts to popularize mathematics education. For example, he writes a bimonthly column “Math Ed Matters by MatthewMaddux” for The Variable, where he tells slightly bent, untold, true stories of mathematics teaching and learning. Egan is an ardent user of social media for mathematics education (see, for example, his web log, MatthewMaddux Education) and his digital curation of the mathematics education information he finds via the web has led him to be known as the yahoo (in, of course, a web directory sense) of mathematics education. (ORCID: http://orcid.org/0000-0001-7157-7745)